Contact
We’re a lot easier to make contact with
than aliens in outer space.
Questions about tours and programs? Looking to rent Yerkes? Want to volunteer? Just fill in the blanks below in Contact Us and we’ll reply.
Hours
Inside Open for Ticketed Guests Only
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Sunday
Our schedule @ Get Tickets
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Monday
Our schedule @ Get Tickets
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Tuesday
Our schedule @ Get Tickets
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Wednesday
Our schedule @ Get Tickets
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Thursday
Our schedule @ Get Tickets
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Friday
Our schedule @ Get Tickets
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Saturday
Our schedule @ Get Tickets
Unless there is a private event, our grounds and parking lot are typically open. Our tour tickets are made available only a month or two in advance, but rest assured we’re open year-round for tours, private events, performances, and more. Please check our Tickets page for available tour, event, and performance dates.
Yerkes Observatory is occasionally closed for weddings, business meetings, conferences, cocktail parties, and private tours. Prior to planning your visit please click here to confirm availability.
Contact us
Use the form or the information below:
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Yerkes Observatory
373 W. Geneva Street
Williams Bay, Wisconsin 53191 -
Planet Earth
Latitude: 42.5704° N
Longitude: 88.5563° W
Find us
KEEP YERKES THRIVING FOR A NEW GENERATION OF EXPLORERS
Help us continue
the legacy.
More than 125 years ago, a determined founder, masterful architect, skilled trades workers, diligent engineers, and inventive entrepreneurs built Yerkes. Visionary astronomers and astrophotographers put it on the galaxy’s map. A dedicated group of locals saved Yerkes for future generations. And now we look to you. Please consider becoming a contributor and friend of Yerkes Observatory. Your participation means everything.
Want to talk about an estate or legacy gift? Want to see if you can help us with your time as a volunteer?
EMAIL US